Bidirectional driving linear ultrasonic motor

The invention discloses a bidirectional driving linear ultrasonic motor. A rotor comprises a slide bar and a friction layer arranged on the surface of the slide bar; a stator comprises a support, two identical ultrasonic vibration transducers fixed by the support, two identical elliptic vibration mode convertors, and two identical friction driving blocks arranged at the front ends of the elliptic vibration mode convertors; the elliptic vibration mode convertors are arranged at the front ends of the ultrasonic vibration transducers, and are cylindrical integrally; three staggered rectangular notches are formed on the upper side and the lower side of each elliptic vibration mode convertor; longitudinal ultrasonic vibration generated by the ultrasonic vibration transducers is converted into elliptic vibration of the tail ends of the elliptic vibration mode convertors and the friction driving blocks; and the two ultrasonic vibration transducers drive the rotor to make bidirectional continuous linear motion when the two ultrasonic vibration transducers work respectively.